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I haven't read all the pages, but I think my opinion will coincide with most of the others!
So, these are essential skills; you absolutely must get them:
1. WISDOM - without wisdom, you're a disgrace. It's not up for debate. This is the MOST important skill.
2. EARTH MAGIC. I've lost many XL maps because I didn't have Earth Magic.
3. AIR MAGIC.
4. LOGISTICS. It's incredibly useful for any hero from any castle, regardless of the map size.
5. PATHFINDING. Same as #4.
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Without this set, you can't really play the game.
The rest of the skills depend on what you get. If FIRE is offered, I'll take it. WATER, no.
In general, each skill can play a crucial role at a certain point, and sometimes it's IMPOSSIBLE to win without it.
But you CAN'T play without WISDOM. You'll have to reload the entire map because you'll realize that you'll be torn to shreds over time, and you won't be able to hold the castles.
Without EARTH, you can also reload on X, XL maps.
Without AIR, you can try to fight, but the game usually drags on for HUNDREDS of turns.
EVERY SKILL is cool in its own way. There are no bad or terrible skills; people just don't know how to use them properly... and I'm no exception
